Boult family London - Hugenot connections

My 6x great grandfather is Thomas Boult who died in 1765 in London. In documents from the Hugenot society it appears that his ancestors left Spain or Portugal around 1640 and went to France. They settled in the district of Bigorre (Cevennes) and it was probably about 1700 during the troubles of the Camisards that they fled to England. His descendants that I have found so far are: